Deadbolt



FIG. 1 is a perspective view of a deadbolt showing a new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a left side view thereof.

The broken line showing on the back of the deadbolt is included for the purpose of illustrating environmental structure and forms no part of the claimed design. 

The ornamental design for a deadbolt, as shown and described. 